Answer:
Whats the question
Step-by-step explanation:
Answer:
x=-4, y=15
Step-by-step explanation:
3x+y=3
2x+y=7
Multiply top by -1
-3x-y=-3
2x+y=7
Add equations together
-x=4
x=-4
Plug x=-4 into any equation
3(-4)+y=3
-12+y=3
y=15
3.)
Variables:
New tablet cost (575),
Money already saved, (56),
Money saved per week(14w)
Write an Equation:
The amount of weekly money you need to earn must cover the leftover cost needed to buy the tablet, therefore:
money_needed - money_you_have = money_earned_per_week
575 - 56 = 14w
Solving:
575 - 56 = 14w
519 = 14w
37.071428 = w
37 weeks needed
You solve the other two on your own.
A trapezoid is a quadrilateral because it has 4 sides. A quadrilateral is not always a trapezoid because a quadrilateral can be any shape as long as it has four sides.
I may not make sense but I hoped this helped! :)